NXP Semiconductors MC9S08QD4MPC

Overview

MC9S08QD4MPC from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 MHz CPU, 4 KB Flash, 256 B RAM, and integrated ADC, dual timers, and keyboard interrupt module - designed for cost-sensitive embedded control in industrial sensors and appliance subsystems.

For engineers reviewing the MC9S08QD4MPC datasheet, MC9S08QD4MPC pinout, MC9S08QD4MPC application, or MC9S08QD4MPC equivalent, key selection criteria include its 8-pin SOIC package, single-wire background debug interface, internal clock source with ±2% accuracy over temperature, and support for Wait/Stop2/Stop3 low-power modes in resource-constrained designs.

Technical Context

The MC9S08QD4MPC implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and hardware-triggered ADC conversions via RTI. Its ICS module integrates a frequency-locked loop (FLL) with precision-trimmed internal reference for stable bus clock generation without external crystals.

Peripherals include TIM1 (2-channel timer/PWM), TIM2 (1-channel timer/PWM), 4-channel 10-bit ADC with temperature sensor and bandgap reference, and KBI (4-pin keyboard interrupt) with software-selectable edge/level sensitivity - all operating under a unified power management architecture with COP watchdog and low-voltage detect reset/interrupt.

Key Specifications

Pinout & Package

MC9S08QD4MPC is housed in an 8-pin SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant and optimized for compact PCB layouts in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with S9S08QD4MPC and MC9S08QG4CDTE, the MC9S08QD4MPC delivers optimal cost and size efficiency for fixed-function control tasks where 8-pin SOIC and minimal peripheral set meet requirements - avoiding overdesign while maintaining full debug and low-power capability.

Availability

MC9S08QD4MPC is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance subsystems, and automotive body control modules requiring stable component supply across long-lifecycle production programs.

Supply support for MC9S08QD4MPC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MC9S08QD4MPC belongs to NXP's legacy HCS08 MCU family - engineered for ultra-low-cost, low-power embedded control in space- and budget-constrained applications where simplicity, reliability, and debug accessibility are critical.

FAQ

What is the maximum operating frequency of the MC9S08QD4MPC?

The MC9S08QD4MPC features an HCS08 CPU core rated for up to 16 MHz operation. This frequency is achieved using the internal clock source (ICS) with FLL enabled and properly configured bus dividers. The actual achievable bus clock depends on ICS trim settings and supply voltage, but the device guarantees full functionality at 16 MHz across its specified temperature and voltage range (–40 °C to +125 °C, 2.7–5.5 V). The MC9S08QD4MPC does not require an external crystal to reach this speed.

Does the MC9S08QD4MPC support in-system programming via its debug interface?

Yes, the MC9S08QD4MPC supports full in-system programming (ISP) and debugging through its single-wire background debug (BDM) interface on the BKGD/MS pin. Using standard BDM tools, users can erase, program, and verify Flash memory, set breakpoints, and inspect registers without removing the MC9S08QD4MPC from the target board. This capability is fully supported in the MC9S08QD4MPC's on-chip debug module and requires no additional hardware beyond the BDM pod and host PC.

What are the power supply requirements for the MC9S08QD4MPC?

The MC9S08QD4MPC operates from a single supply rail of 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V system designs. It integrates internal voltage regulation and low-voltage detection (LVD) circuitry that triggers reset or interrupt when VDD drops below programmable thresholds (e.g., 2.5 V or 2.8 V). The MC9S08QD4MPC draws less than 1 µA in Stop3 mode and approximately 1.5 mA at 16 MHz/3.3 V in Run mode - enabling battery-powered operation for years in duty-cycled applications.

Can the MC9S08QD4MPC ADC measure temperature directly?

Yes, the MC9S08QD4MPC includes an on-die temperature sensor channel accessible via the 10-bit ADC. When configured to read the internal bandgap reference and temperature sensor simultaneously, the MC9S08QD4MPC provides calibrated temperature measurements across its operating range. The datasheet provides the conversion equation and typical accuracy (±5 °C) - no external sensor or signal conditioning is required to implement thermal monitoring in applications like motor control or environmental sensing.

Is the MC9S08QD4MPC pin-compatible with other members of the QD4 family?

Yes, the MC9S08QD4MPC shares identical pinout and electrical characteristics with the S9S08QD4MPC (automotive variant) in the same 8-pin SOIC package. Both devices use the same VDD, VSS, RESET, BKGD/MS, IRQ, PTA0–PTA5 pin assignments and drive specifications. Firmware and PCB layouts designed for MC9S08QD4MPC are directly reusable with S9S08QD4MPC - the only differences are qualification level and part marking; no hardware or software changes are needed for substitution.